What is the solution of the system?

Solve the system of equations using the substitution method.
x-y=-1
5x+4y=-23

Eqn (1) to be mly by 4,

then we have 4x-4y=-4,
(2)5x+4y=-23
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9x+ 0=-27
9x=-27
x=-27/9=-3
x=-3.
to get y,
we substitute in the eqn(1)
(x-y=-1) as -3-y=-1
-3+1=y
y=-2.

Therefore, we get x=-3
y=-2

To solve the system of equations using the substitution method, we can solve one equation for one variable and substitute that expression into the other equation.

Let's solve the first equation for x:

x - y = -1

First, we add y to both sides of the equation to isolate x:

x = y - 1

Now, we substitute this expression for x in the second equation:

5x + 4y = -23

Replacing x with y - 1:

5(y - 1) + 4y = -23

Now, we simplify the equation:

5y - 5 + 4y = -23

Combine like terms:

9y - 5 = -23

Next, we'll isolate y by adding 5 to both sides:

9y = -18

Divide both sides by 9:

y = -2

Now that we have the value for y, we can substitute it back into the first equation to solve for x:

x - (-2) = -1

x + 2 = -1

Subtract 2 from both sides:

x = -3

Therefore, the solution to the system of equations is x = -3 and y = -2.